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Subject:
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Callback in 3 DropDownLists
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Posted By:
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Paula222
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Post Date:
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12/13/2006 3:40:14 AM
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Hi ,
i read data to 3 combos - 2 of them depend on other . I don't know how to do another callback to the third DDL - it causes some problems.
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Reply By:
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gbianchi
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Reply Date:
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12/13/2006 7:20:45 AM
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hi there.. do you have some code?? or any specific problem???
HTH
Gonzalo
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Reply By:
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Paula222
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Reply Date:
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12/13/2006 7:47:26 AM
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Hi ,
here is the javascript code in .aspx file :
<script language="javascript">
function ClientCallback(result, context){
var childOrganizations = document.forms[0].elements[
'<%=ddlSubCat.UniqueID%>'];
if (!childOrganizations){
return;
}
childOrganizations.length = 0;
if (!result){
return;
}
grp = result.split("~")[1];
result = result.split("~")[0];
var rows = result.split('|');
for (var i = 0; i < rows.length; ++i){
var values = rows[i].split('^');
var option = document.createElement("OPTION");
option.value = values[0];
option.innerHTML = values[1];
if (option != undefined && values[1] != undefined && values[0] != undefined) {
childOrganizations.appendChild(option);
}
//childOrganizations.options.add(option , i);
}
var childGrp = document.forms[0].elements[
'<%=ddlGroup.UniqueID%>'];
childGrp.length = 0;
var rows1 = grp.split('|');
for (var j = 0; j < rows1.length; ++j){
var values1 = rows1[j].split('^');
var option1 = document.createElement("OPTION");
option1.value = values1[0];
option1.innerHTML = values1[1];
if (option1 != undefined && values1[1] != undefined && values1[0] != undefined) {
childGrp.appendChild(option1);
}
}
}
function ClientCallback1(result, context){
var childGrp = document.forms[0].elements[
'<%=ddlGroup.UniqueID%>'];
childGrp.length = 0;
var rows1 = result.split('|');
for (var j = 0; j < rows1.length; ++j){
var values1 = rows1[j].split('^');
var option1 = document.createElement("OPTION");
option1.value = values1[0];
option1.innerHTML = values1[1];
if (option1 != undefined && values1[1] != undefined && values1[0] != undefined) {
childGrp.appendChild(option1);
}
//childOrganizations.options.add(option , i);
}
}
function GetChildren(arg, context)
{
<%= callBack %>
}
function GetSubChildren(arg, context)
{
<%= callBack1 %>
}
</script>
AND here is part of the .aspx.cs file code :
public partial class BookPhone : System.Web.UI.Page , ICallbackEventHandler
{
public string callBack , callBack1;
public int choice = 1;
int arg = 0 , arg3 = 0 ;
protected void Page_Load(object sender, EventArgs e)
{
//Response.Write("<script language='JavaScript'>alert('" + Request.Cookies["PUID"].Value + "');</script>");
/*if (Request.Cookies["PUID"] == null || Request.Cookies["PUID"].Value.Trim().Equals(""))
{
Response.Redirect("default.aspx");
}
if (!new UserOwnBooksController().IsUserOwnsBooks(Request.Cookies["PUID"].Value , TryParse(Request.QueryString["BID"])))
{
Response.Redirect("default.aspx");
}*/
DataRow dr = new BooksController().GetSpecificBook(int.Parse(Request.QueryString["BID"]));
lblCount2.Text = new PhoneController().GetNumOfRecords(int.Parse(Request.QueryString["BID"])).ToString();
//imgPrint1.OnClientClick = "OpenPopUp('" + Request.QueryString["BID"] + "' , '" + txtSearchWords.Text.Trim() + "' , '" + ddlCat111.SelectedValue + "' , '" + ddlSubCat111.SelectedValue + "' , '" + ddlGroup111.SelectedValue + "');";
imgPrint1.PostBackUrl = "PrintScreen.aspx?BID=" + Request.QueryString["BID"] + "&KID=" + txtSearchWords.Text.Trim() + "&CatID=" + ddlCat111.SelectedValue + "&SID=" + ddlSubCat111.SelectedValue + "&GID=" + ddlGroup111.SelectedValue + "";
if (!Page.IsPostBack)
{
PopulateBirthDate();
PopulateSearch();
}
if (dr != null)
{
lblHeader1.Text = dr[1].ToString();
}
foreach (GridViewRow gr in GridView1.Rows) {
DataRow dr1 = new PhoneController().GetSpecificRow(TryParse(Request.QueryString["BID"]));
if (dr1 != null)
{
gr.ForeColor = System.Drawing.Color.FromName(dr1[26].ToString());
gr.Font.Size = new FontUnit(dr1[25].ToString());
gr.Font.Name = dr1[24].ToString();
}
}
callBack = Page.ClientScript.GetCallbackEventReference(this, "arg" , "ClientCallback", "context");
callBack1 = Page.ClientScript.GetCallbackEventReference(this, "arg", "ClientCallback1", "context");
ddlCat.Attributes.Add("onchange", "GetChildren(this.options[this.selectedIndex].value, 'ddlSubCat');");
ddlSubCat.Attributes.Add("onchange", "GetSubChildren(this.options[this.selectedIndex].value , 'ddlGroup')");
}
public void RaiseCallbackEvent(string eventArgument)
{
if (choice == 1)
{
int parentId;
if (Int32.TryParse(eventArgument, out parentId))
{
int firstNum = -1000;
DataTable dt = new BSubCatsController().GetSubCatsByBookAndCat(int.Parse(Request.QueryString["BID"]), int.Parse(eventArgument));
StringBuilder sb = new StringBuilder();
for (int i = 0; i < dt.Rows.Count; ++i)
{
sb.Append(dt.Rows[i]["SubCatID"]);
sb.Append("^");
sb.Append(dt.Rows[i]["SubCatDescription"]);
sb.Append("|");
if (firstNum == -1000)
{
firstNum = (int)dt.Rows[i]["SubCatID"];
}
}
sb.Append("~");
arg = int.Parse(eventArgument);
DataTable dt1 = new BGroupsController().GetGroupByBookCatAndSubCat(int.Parse(Request.QueryString["BID"]), arg, firstNum);
foreach (DataRow dr1 in dt1.Rows)
{
sb.Append(dr1["GroupID"]);
sb.Append("^");
sb.Append(dr1["GroupDesc"]);
sb.Append("|");
}
}
}
else if (choice == 2)
{
StringBuilder sb1 = new StringBuilder();
arg3 = int.Parse(eventArgument);
int theNum = arg3 ;
DataTable dt3 = new BGroupsController().GetGroupByBookCatAndSubCat(int.Parse(Request.QueryString["BID"]), arg, theNum);
foreach (DataRow dr3 in dt3.Rows)
{
sb1.Append(dr3["GroupID"]);
sb1.Append("^");
sb1.Append(dr3["GroupDesc"]);
sb1.Append("|");
}
}
}
public string GetCallbackResult()
{
if (choice == 1)
{
int firstNum = -1000;
DataTable dt = new BSubCatsController().GetSubCatsByBookAndCat(int.Parse(Request.QueryString["BID"]), arg);
StringBuilder sb = new StringBuilder();
for (int i = 0; i < dt.Rows.Count; ++i)
{
sb.Append(dt.Rows[i]["SubCatID"]);
sb.Append("^");
sb.Append(dt.Rows[i]["SubCatDescription"]);
sb.Append("|");
if (firstNum == -1000)
{
firstNum = (int)dt.Rows[i]["SubCatID"];
}
}
sb.Append("~");
DataTable dt1 = new BGroupsController().GetGroupByBookCatAndSubCat(int.Parse(Request.QueryString["BID"]), arg, firstNum);
foreach (DataRow dr1 in dt1.Rows)
{
sb.Append(dr1["GroupID"]);
sb.Append("^");
sb.Append(dr1["GroupDesc"]);
sb.Append("|");
}
return sb.ToString();
}
else if (choice == 2)
{
StringBuilder sb1 = new StringBuilder();
DataTable dt3 = new BGroupsController().GetGroupByBookCatAndSubCat(int.Parse(Request.QueryString["BID"]), arg, arg3);
foreach (DataRow dr3 in dt3.Rows)
{
sb1.Append(dr3["GroupID"]);
sb1.Append("^");
sb1.Append(dr3["GroupDesc"]);
sb1.Append("|");
}
return sb1.ToString();
}
return "";
}
if this code is not sufficient - i'll send you the files to email.
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Reply By:
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gbianchi
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Reply Date:
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12/13/2006 7:53:06 AM
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i don't have a clue about js, sorry...
you are doing the callbacks with js?
HTH
Gonzalo
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